postgresql13-llvm jit-13.5-1PGDG.rhel8.x86_64

I was trying to upgrade my test 13.4 instance on Oracle Linux 8.4
(x86_64) to 13.5. I can't upgrade postgresql13-llvm jit because Oracle's
and Red Hat repositories still don't have the required version of llvm
(12.1.0.2):

root(at)postgres mgogala]# rpm -qa|grep llvm
llvm-libs-11.0.1-2.0.1.module+el8.4.0+20397+f876858a.x86_64
llvm7.0-libs-7.0.1-7.el8.x86_64
llvm-test-11.0.1-2.0.1.module+el8.4.0+20397+f876858a.x86_64
llvm-11.0.1-2.0.1.module+el8.4.0+20397+f876858a.x86_64
llvm-static-11.0.1-2.0.1.module+el8.4.0+20397+f876858a.x86_64
llvm-devel-11.0.1-2.0.1.module+el8.4.0+20397+f876858a.x86_64
[root(at)postgres mgogala]#

I am getting the following error:

postgresql13-llvm jit-13.5-1PGDG.rhel8.x86_64 requires
libLLVM-12.so()(64bit), but none of the providers can be installed.

There is a CentOS8-stream version which solves the problem but I cannot
use that in the office. I will probably have to wait for another month
before OL8 has everything that I need in its repositories. Now, the
question is what kind of an impact will running without llvm-jit have?
According to the links below, llvm-jit effects are quite spectacular:

https://llvm.org/devmtg/2016-09/slides/Melnik-PostgreSQLLLVM.pdf

https://www.pgcon.org/2017/schedule/events/1092.en.html

Now, the question is whether anyone on this list can quantify the
difference? What would be a better option? To wait for the repos to
receive the necessary packages or to run without llvm-jit? In the office
I have some rather large databases and CREATE INDEX CONCURRENTLY and
REINDEX CONCURRENTLY  fixes in 13.5 are highly desired but not at the
cost of the overall application performance.

Regards

--
Mladen Gogala
Database Consultant
Tel: (347) 321-1217
https://dbwhisperer.wordpress.com